#173B50#173B50

#173B50 is a dark, muted cyan. Relative luminance 0.039; OKLCH L 33.6% C 0.055 H 237.2°. Best body text is #FFFFFF at 11.81:1 contrast (WCAG AA passes).

Color values

HEX	#173B50
RGB	rgb(23, 59, 80)
HSL	hsl(202, 55%, 20%)
HSV	hsv(202, 71%, 31%)
CMYK	cmyk(71.2%, 26.2%, 0%, 68.6%)
CIE-LAB	lab(23.30, -5.22, -16.57)
CIE-LCH	lch(23.30, 17.37, 252.49°)
OKLab	oklab(33.64% -0.0299 -0.0465)
OKLCH	oklch(33.64% 0.055 237.2)
XYZ	xyz(3.3647, 3.8889, 8.1612)
Luminance	0.0389 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B50 #502C17

analogous

#175048 #173B50 #171F50

triadic

#173B50 #50173B #3B5017

tetradic

#173B50 #481750 #502C17 #1F5017

square

#173B50 #481750 #502C17 #1F5017

split-complementary

#173B50 #50171F #504817

monochromatic

#071218 #091820 #173B50 #255E80 #3281AF

Accessibility & contrast

On white

11.81

#173B50 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#173B50 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B50

11.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B50	#FFFFFF	#000000	##FFFFFF
##173B50	1.00	11.81	1.78	11.81
#FFFFFF	11.81	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#313B51

Deuteranopia (green-blind)

#293550

Tritanopia (blue-blind)

#004042

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #173b50;
/* rgb */ color: rgb(23, 59, 80);
/* oklch */ color: oklch(33.6% 0.055 237.2);

Tailwind

colors: {
  custom: {
    50: '#5b7081',
    500: '#173b50',
    950: '#000000',
  },
}

SCSS

$custom: #173b50;
$custom-light: #5b7081;
$custom-dark: #000000;

JSON

{
  "hex": "#173b50",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 80
  },
  "hsl": {
    "h": 202.105,
    "s": 55.34,
    "l": 20.196
  },
  "oklch": {
    "l": 0.33644,
    "c": 0.05533,
    "h": 237.2
  },
  "luminance": 0.03889
}

Semantic roles & 50–950 ramp

primary

#173B50

secondary

#87573C

accent

#8049DF

background

#F5F6F7

surface

#E9ECEE

border

#C5C7C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #173B50

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →